Bug 2532366 (CVE-2026-80940)

Summary:	CVE-2026-80940 kernel: wifi: rtw88: pci: fix resource leak on failed NAPI setup
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, rhel-process-autobot, sghai, sidsharm, suppawar, vlaad, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
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Doc Text:	A flaw was found in the Linux kernel's rtw88 PCI driver. During the probe process, if the NAPI (Networked Attached Peripheral Interface) setup fails, allocated PCI resources are not properly released. This resource leak could potentially lead to a Denial of Service (DoS) due to resource exhaustion, impacting system stability.	Story Points:	---
Clone Of:		Environment:
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-09-11 22:34:43 UTC

In the Linux kernel, the following vulnerability has been resolved:

wifi: rtw88: pci: fix resource leak on failed NAPI setup

rtw_pci_probe() allocates PCI resources through
rtw_pci_setup_resource() before it sets up NAPI. If
rtw_pci_napi_init() fails, the error path jumps straight to
err_pci_declaim and skips rtw_pci_destroy(), leaving the PCI
resources allocated by rtw_pci_setup_resource() behind.

Add a dedicated cleanup label for the NAPI setup failure path so probe
destroys the PCI resources.

The bug was first flagged by an experimental analysis tool we are
developing for kernel memory-management bugs while analyzing current
mainline kernels. The tool is still under development and is not yet
publicly available. Manual inspection confirms that the bug is still
present in v7.1-rc7.

An x86_64 allyesconfig build showed no new warnings. As we do not have a
suitable rtw88 PCI board to test with, no runtime testing was able to be
performed.

Comment 1 Keith Grant 2026-09-14 14:49:10 UTC

Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80940.mbox